Attacks against Flintspark, AC 22 + 4 cover:
Rolled 1d20+22 : 7 + 22, total 29
Rolled 1d20+17 : 18 + 17, total 35
Rolled 1d20+12 : 6 + 12, total 18
If Flintspark dies, further attacks are against Loptr.
Concealment from Adhuil's illusion:
Rolled 1d2 : 2, total 2
Rolled 1d2 : 1, total 1
Rolled 1d2 : 1, total 1
Damage if against Flintspark:
Rolled 1d4+10 : 4 + 10, total 14
Rolled 1d4+10 : 3 + 10, total 13
Rolled 1d4+10 : 3 + 10, total 13
Damage if against Loptr:
Rolled 1d8+7 : 8 + 7, total 15
Rolled 1d8+7 : 3 + 7, total 10
Rolled 1d8+7 : 6 + 7, total 13